不同水氮处理对膜下滴灌烤烟叶面积指数的影响

为了研究不同水氮处理对烤烟叶面积指数的影响,依据烤烟生长习性设计了13种水氮处理方式,并且基于移栽后时间建立了余弦模型、指数模型和线性模型来对烤烟叶面积指数进行动态模拟,利用均方差、相关系数以及作物生长规律对模型进行检测与比较。结果表明:指数模型的模拟值与实测值之间均方差最小,仅为0.0712~0.1325,相关系数最高,达到0.9914~0.9975,且符合作物生长规律,能够很好地预测烤烟叶面积指数的动态变化过程;不同的水氮处理对烤烟叶面积指数产生显著影响,灌溉量和施氮量大体上与烤烟叶面积指数呈现正相关,但是两者的过多使用会在一定程度上抑制烤烟的生长发育;同时,在相同灌溉量和施氮量条件下,膜...

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Published in江西农业学报 Vol. 28; no. 2; pp. 65 - 69
Main Author 徐元 吴蕴玉 侯毛毛 胡润欣 邵孝侯
Format Journal Article
LanguageChinese
Published 河海大学 大禹学院,江苏 南京,210098%河海大学 水利水电学院,江苏 南京,210098%福建农林大学 园艺学院,福建 福州,350000 2016
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ISSN1001-8581

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Summary:为了研究不同水氮处理对烤烟叶面积指数的影响,依据烤烟生长习性设计了13种水氮处理方式,并且基于移栽后时间建立了余弦模型、指数模型和线性模型来对烤烟叶面积指数进行动态模拟,利用均方差、相关系数以及作物生长规律对模型进行检测与比较。结果表明:指数模型的模拟值与实测值之间均方差最小,仅为0.0712~0.1325,相关系数最高,达到0.9914~0.9975,且符合作物生长规律,能够很好地预测烤烟叶面积指数的动态变化过程;不同的水氮处理对烤烟叶面积指数产生显著影响,灌溉量和施氮量大体上与烤烟叶面积指数呈现正相关,但是两者的过多使用会在一定程度上抑制烤烟的生长发育;同时,在相同灌溉量和施氮量条件下,膜下滴灌方式所得的最大叶面积指数比传统沟灌的增大了16.76%,说明膜下滴灌技术对烤烟的生长发育起到了很好的促进作用。
Bibliography:36-1124/S
XU Yuan, WU Yun-yu2, HOU Mao-mao3, HU Run-xin2, SHAO Xiao-hou2. ( 1. College of Dayu, Hohai University, Nanjing 210098, China; 2. College of Water Conservancy and Hydropower Engi- neering, Hohai University, Nanjing 210098, China; 3. College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350000, China)
In order to study the influence of different water and nitrogen coupling on the leaf area index( LAI) of flue-cured tobacco,thirteen water and nitrogen coupling treatments were designed according to the growth habit of flue- cured tobacco,dynamic simulation was conducted for the leaf area index of flue-cured tobacco by establishing cosine model,exponential model and linear model on the basis of time( t) after transplantation,detection and comparison were carried out for the models by utilizing root-mean-square error( RMSE),correlation coefficient( R-square) and crop growth law. The results showed that root-meansquare error between the simulated value and measured value of exponential
ISSN:1001-8581